Explain thi

Due to the fast movement of the train, the line of sight of the passenger for nearby objects changes rapidly. So, the nearby trees, houses, etc. appear to move fast in the opposite direction. But, in case of distant objects, the line of sight changes very slowly. So, the distant objects like hilltops, moon, stars, etc. seem to be stationary.

NOTE: Line of sight is an imaginary line joining an object to the viewer’s eyes.